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Prestimulus theta activity predicts correct source memory retrieval.

ABSTRACT: Recent evidence indicates that the processing of a stimulus can be influenced by preceding patterns of brain activity. Here we examine whether prestimulus oscillatory brain activity can influence the ability to retrieve episodic memories. Neural activity in the theta-frequency band (4-8 Hz) was enhanced before presentation of test items which elicited accurate recollection of contextual details of the prior study episode ("source retrieval"), relative to trials for which item recognition was successful but source retrieval failed. Poststimulus theta activity was also related to source retrieval, and the magnitude of poststimulus theta was predicted by the magnitude of the prestimulus theta effects. The results suggest that ongoing neural processes occurring before stimulus onset might play a critical role in readying the brain for successful memory retrieval.

SUBMITTER: Addante RJ

PROVIDER: S-EPMC3127901 | biostudies-other | 2011 Jun

REPOSITORIES: biostudies-other

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Prestimulus theta activity predicts correct source memory retrieval.

Addante Richard J RJ Watrous Andrew J AJ Yonelinas Andrew P AP Ekstrom Arne D AD Ranganath Charan C

Proceedings of the National Academy of Sciences of the United States of America 20110613 26

Recent evidence indicates that the processing of a stimulus can be influenced by preceding patterns of brain activity. Here we examine whether prestimulus oscillatory brain activity can influence the ability to retrieve episodic memories. Neural activity in the theta-frequency band (4-8 Hz) was enhanced before presentation of test items which elicited accurate recollection of contextual details of the prior study episode ("source retrieval"), relative to trials for which item recognition was suc ...[more]

PMID: 21670287

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